NEW YORK (AP) â¿¿ A look at the 10 biggest volume gainers on New York Stock Exchange at the close of trading:

Best Buy Co. : Approximately 30,624,600 shares changed hands, a 309.5 percent increase over its 65-day average volume. The shares fell $1.61 or 6.5 percent to $23.35.

K12 Inc. : Approximately 647,400 shares changed hands, a 295.1 percent increase over its 65-day average volume. The shares fell $.33 or 1.3 percent to $25.69.

KAR Auction Services Inc. : Approximately 1,929,200 shares changed hands, a 791.5 percent increase over its 65-day average volume. The shares rose $.48 or 3.5 percent to $14.18.

Magnatek Inc. : Approximately 355,600 shares changed hands, a 567.3 percent increase over its 65-day average volume. The shares fell $.22 or 18.2 percent to $.99.

NeuStar Inc. : Approximately 1,955,500 shares changed hands, a 391.4 percent increase over its 65-day average volume. The shares rose $.84 or 3.6 percent to $24.44.

PAA Natural Gas Storage LP : Approximately 373,200 shares changed hands, a 428.3 percent increase over its 65-day average volume. The shares rose $.40 or 2.4 percent to $16.80.

QR Energy LP : Approximately 439,200 shares changed hands, a 353.4 percent increase over its 65-day average volume. The shares rose $1.84 or 10.3 percent to $19.62.

Silvercorp Metals Inc. : Approximately 35,102,700 shares changed hands, a 680.2 percent increase over its 65-day average volume. The shares fell $1.54 or 19.6 percent to $6.30.

Theragenics Corp. : Approximately 260,300 shares changed hands, a 669.4 percent increase over its 65-day average volume. The shares fell $.03 or 2.0 percent to $1.44.

VeriFone Systems Inc. : Approximately 14,453,100 shares changed hands, a 428.2 percent increase over its 65-day average volume. The shares rose $.51 or 1.4 percent to $36.65.
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